Black seed (Nigella sativa) as an adjuvant therapy in the treatment of patients with rheumatoid arthritis Clinical trial. Journal of Pharmaceutical Negative Results, [S. l.], v. 13, n. 4, p. 1141–1146, 2022. DOI: 10.47750/pnr.2022.13.04.159. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/3111.. Acesso em: 23 jun. 2026.